If the batteries have been replaced the volume and tv power function from the remote will not work.
I t will need to be reprogrammed, the codes are 11100, 10000, 11312 if the ok select swith is red if the ok select swith is grey then use the code 0000 or 0111

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check to be sure your remote is sending IR signal, with
a smart phone camera hold remote IR eye in front of camera and click any buttons on remote, you should see
a light coming from IR eye. If no light emitting, remote needs to be replaced.

Different channels have different aspect ratios on digital cable. Go in your book that came with set and find changing aspect ratio...or call 4.3 16.9....or zoom.....full....streach...etc. Also look on your remote control. There may be a button to change that also. Simple problem. The hardest thing with these new sets is learning how to operate them properly. Read your book. Put it in the bathroom. You'll have alot of time to learn about your set if you do that..I'm serious. This new stuff has so many things it can do, it's crazy!! And you thought setting the time on the vcr was hard!!!! Good luck and let me know if you need more help.